Artikel i vetenskaplig tidskrift, 2009

Elastic SH wave propagation in a layered anisotropic plate with
interface damage is modelled in several steps. A single interface
crack between two half-spaces is first studied and an explicit
solution for the crack-opening displacement is obtained at low
frequencies. This is then generalized to a random distribution of
cracks at the interface and the result is reformulated as a spring
boundary condition. As an example of its usefulness,
this boundary condition is then used in the
derivation of a plate equation by expanding the displacements in
power series in the thickness coordinate.